http://www.helium.com/knowledge/4170-why-is-the-use-of-cellular-phones-not-permitted-on-airplanes.xml Helium.com > Phone Technologies & Issues > Why the use of cellular phones is not permitted on airplanes en-us Copyright Helium.com Wed, 29 Jul 2009 15:36:05 GMT Wed, 29 Jul 2009 15:36:05 GMT